<template>
	<div class="list" ref='wrapper'>
			<div>
				<div class="area">
					<div class="title border-topbottom">当前城市</div>
					<div class="button-list">
						<div class="button-wrapper">
							<div class="button">{{this.currentCity}}</div>
						</div>
					</div>
				</div>
				<div class="area border-topbottom">
					<div class="title">热门城市</div>
					<div class="button-list">
						<div 
							class="button-wrapper" 
							v-for="item of hot" 
							:key='item.id'
							@click="handleCityClick(item.name)"
						>
							<div class="button">{{item.name}}</div>
						</div>
						
					</div>
				</div>
				<div class="area" v-for="(item, key) of cities" :key='key' :ref='key'>
					<div class="title border-topbottom">{{key}}</div>
					<div class="item-list">
						<div 
							class="item border-bottom" 
							v-for="innerItem of item" 
							:key='innerItem.id'
							@click="handleCityClick(innerItem.name)"
						>
							{{innerItem.name}}
						</div>
					</div>
					
				</div>
			</div>
	</div>
</template>

<script>
	import Bscroll from 'better-scroll'
	import { mapState, mapMutations } from 'vuex'
	export default {
		name: 'CityList',
		props:{
			hot: Array,
			cities: Object,
			letter: String
		},
		computed: {
	  	...mapState({
	  		currentCity: 'city'
	  	})
	  },
		methods: {
			handleCityClick (city) {
				this.changeCity(city)
				this.$router.push('/')
			},
			...mapMutations(['changeCity'])
		},
		watch: {
			letter () {
				if (this.letter) {
					
					const element = this.$refs[this.letter][0]
					
					this.scroll.scrollToElement(element)
				}
			}
		},
		mounted () {
			this.scroll = new Bscroll(this.$refs.wrapper)
		}
		
	}
</script>

<style lang="stylus" scoped>
	@import '~styles/varibles.styl'
	.border-topbottom
		&:before
			border-color: #ccc
		&:after
			border-color: #ccc
	.border-bottom
		&:before
			border-color: #ccc
	.list
		overflow: hidden
		position:absolute
		top: 1.58rem
		right: 0
		bottom: 0
		left: 0
		.title
			line-height: .54rem
			background: #eee
			padding-left: .2rem
			color: #666
			font-size: .26rem
		.button-list
			padding: .1rem .6rem .1rem .1rem
			overflow: hidden
			.button-wrapper
				float: left
				width: 33.33%
				.button
					margin: .1rem
					padding: .1rem 0
					text-align: center
					border: .02rem solid #ccc
					border-radius:.06rem
		.item-list
			.item
				line-height: .76rem
				padding-left: .2rem
			
</style>